Increased risk of dislocation after primary total hip arthroplasty in inflammatory arthritisA prospective observational study of 410 hips
Open Access
- 1 January 2004
- journal article
- research article
- Published by Medical Journals Sweden AB in Acta Orthopaedica
- Vol. 75 (6), 684-690
- https://doi.org/10.1080/00016470410004049
Abstract
Background It is unclear whether patients with inflammatory arthritis have a higher risk of dislocation after hip replacement. Patients and material We carried out a prospective study assessing the incidence of dislocation within 2 years after surgery for patients diagnosed with inflammatory arthritis (IA) and osteoarthrosis (OA). One single type of prosthesis was implanted using a lateral approach. Both diagnostic groups were compared by univariate analysis with respect to dislocation, sex, age, diagnosis, prior hip surgery, experience of the surgeon and malposition of the acetabular component. In a multivariate logistic regression approach, the difference in dislocation incidence was assessed after adjusting for the effect of the potential confounders given above. Between 1996 and 1999, 410 THA were performed: 70 in IA and 340 in OA. After 2 years no patients were lost to follow-up, but 12 patients had died, and 5 revisions were carried out for reasons other than dislocation. Results The dislocation rate in patients with IA was higher than in patients with OA: 10% (7 hips) in the IA group and 3% (10 hips) in the OA group (p = 0.006). No significant differences were found among the risk factors for dislocation between the two groups. Multivariate logistic regression analysis showed that IA is an independent risk factor for dislocation (odds ratio (OR) 3.7, 95% CI 1.3 − 11), together with malposition of the cup in more than 55° abduction (OR 7.7, CI 2.3 − 26) and increased anteversion (OR 7.6, CI 1.4 − 42.4). Interpretation Our findings clearly suggest that inflammatory arthritis has to be considered as an independent risk factor for dislocation after primary THA.Keywords
This publication has 12 references indexed in Scilit:
- The Cumulative Long-Term Risk of Dislocation After Primary Charnley Total Hip ArthroplastyPublished by Ovid Technologies (Wolters Kluwer Health) ,2004
- Femoral head size is a risk factor for total hip luxationA study of 42,987 primary hip arthroplasties from the Norwegian Arthroplasty RegisterActa Orthopaedica, 2003
- Stability of Total Hip Arthroplasty in Patients 75 Years or OlderClinical Orthopaedics and Related Research, 2002
- The Influence of Patient-Related Factors and the Position of the Acetabular Component on the Rate of Dislocation after Total Hip Replacement*The Journal of Bone & Joint Surgery, 1997
- Influence of surgical approach on dislocations after charnley hip arthroplastyThe Journal of Arthroplasty, 1995
- Patient characteristics in dislocations after primary total hip arthroplasty:60 patients compared with a control groupActa Orthopaedica, 1995
- Causes of dislocation of total hip arthroplasty. CT study of component alignmentThe Journal of Bone and Joint Surgery. British volume, 1994
- Primary total hip replacement in patients over 80 years of ageThe Journal of Bone and Joint Surgery. British volume, 1990
- Dislocation following total hip arthroplastyArchives of orthopaedic and trauma surgery, 1985
- Recurrent and Non-Recurrent Dislocation Following Total Hip ArthroplastyActa Orthopaedica, 1982